There`s no set time as to how long it takes someone to start cumming, sometimes i cum in something like 1 minute other times can take me maybe 15 minutes.
Just empty your mind and don`t think about cumming and keep rubbing for as long as it takes, and believe me, it`ll happen.

hi there, im also 18 years old and have never managed to cum from masturbation. i have had wet dreams and have ejaculated but my sperm looked a light greyish colour, not what id expect to be "normal". i have masturbated for 20+ minutes and got kinda bored because i havent managed to cum. sometimes i can feel it gettin ready but then the feelin goes and sometimes i can actually pee, its really hard but sometimes i can pee. it worries me that i cant ejaculate and it even makes my girlfriend feel bad cos she cant get me to either. any help would be appreciated thx

I remember the first time I cummed... I was 12 years old, and I got this sudden urge to fuck everything... It was odd, I was home alone, and I was humping the pillows, and playing with my dick for about an hour before I realised it, then just sat there and beat my meat for about an hour straight. I couldn't stop even though my hand hurt quite a bit. So basically, it took me about 2-3 hours for me to cum for the first time. Now, I can somewhat control/pace myself if I want to last longer, but if I go straight the most I can stay is for about 5-15 minutes.

i get kinda bored after a while tho and the good thoughts go from my head. the feeling comes then goes pretty quick when i feel like i need a really bad pee. then i sometimes get a little piss like fluid come out and the feeling goes